Of course the larger the skin the longer it will take to completely relax. Sometimes the wings of very large birds require soaking half as long as the legs, but care must be exercised not to soak any feathered parts too long, or the feathers are liable to fall out and cause trouble. By this process skins may be softened and made ready to mount, according to their size, as follows: Wren to robin, in twelve to fourteen hours; ruffed grouse, two days; great blue heron, three days; bald eagle, four days; condor, five days; ostrich, six to seven days. Skins which are less than one year old soften in about half the time they would require if five years old, and if properly made in the first place, will make as handsome mounted specimens as would fresh skins.
WET SAND.--Some taxidermists soften dry bird skins by burying them in wet sand after the legs and wings have been relaxed in the way already described. I have tried it occasionally with small skins, and found that the results were quite satisfactory.
A GOOD "SWEAT-BOX."--Professor L.L. Dyche, of the University of Kansas, described to me a sweat-box which he has used, and which is certainly a good one for the creation of a damp atmosphere for the softening of skins, and also to keep half-finished birds in over night, to prevent them from drying up. What a deal of trouble the bird taxidermists of my acquaintance might have saved themselves during the last ten years had they known of, or devised, this simple but perfect contrivance. It is made by selecting a wooden box, of the right size to suit, providing a hinged cover, and coating the entire inside with plaster Paris an inch or so in thickness. To make use of it, it is filled with water and allowed to stand until the plaster lining has soaked full, when the rest of the water is emptied out. If a layer of wet sand is spread over the bottom, the saturation of the air inside the box, when closed, will be still more complete.
A HEROIC METHOD OF RELAXATION.--Mr. William Brewster thus describes "A New Wrinkle in Taxidermy," in Messrs. Southwick & Jencks' "Random Notes," vol. ii., No. 1:
"Wishing to turn a mounted bird into a skin, and having but a limited time to devote to the task, I tried an experiment. Taking a funnel, and inserting the pointed end in the stuffing between the edges of the skin on the abdomen, I poured in a quantity of hot water (nearly boiling hot) taking care to regulate the injection so that it should be rather slowly absorbed by the stuffing, and holding the bird at various angles, that every portion of the anterior might become soaked. The effect was magical; the skin quickly relaxed, and within fifteen minutes I could bend the neck and make other required changes without any risk of a break.